hot sale pdc drill bit 81/2 HM952XG

Rock breaking mechanism:

Diamond bit rock breaking action is accomplished by the diamond particles. To know the role of broken rock drill, we must understand the role of broken rock single grain diamond. In hard formations, single grain diamond drilling at the rock at high pressure effect of stress state (about 4200-5700MPa, some data suggest that up to 6300MPa), the rock lithology change occurs, the plastic becomes brittle. Single grain diamond eat into the formation, under the effect of cutting torque rock breaking, cutting depth is substantially equal to the depth of the diamond particles to eat. The process as "plow" so called plow diamond bit cutting action.

In some brittle rocks inside (such as sandstone, limestone, etc.), diamond particles on a drill bit at the same time the role of WOB torque, broken rock volume is much larger than eating into the rotary volume diamond particles. When the pressure is not only formed along the direction of motion of small diamond groove, it will increase the pressure on small rocks and deep trenches on both sides of the break, the cross-sectional dimensions than the diamond particles.

Diamond bit rock-breaking effect, except with the influence of rock lithology and external factors (such as pressure, temperature, and formation fluid properties, etc.) related, WOB size is an important factor. It cone bit like when you break the surface rock has broken, fatigue crushing, crushing volume in three ways. Only when the diamond particles have enough to eat than the pressure into the formation rock, the rock crushing volume occurred, in order to achieve the desired effect of breaking rock.